roboforum.ru

//ICC-AVR application builder : 04.12.2005 18:35:13
// Target : 2313
// Crystal: 1.0000Mhz

#include <io2313v.h>
#include <macros.h>

void port_init(void)
{
PORTB = 0x80;
DDRB  = 0x80;
PORTD = 0x00;
DDRD  = 0x00;
}

//TIMER0 initialize - prescale:1024
// desired value: 4Hz
// actual value:  4,002Hz (0,1%)
void timer0_init(void)
{
TCCR0 = 0x00; //stop timer
TCNT0 = 0x0C; //set count
TCCR0 = 0x05; //start timer
}

#pragma interrupt_handler timer0_ovf_isr:7
void timer0_ovf_isr(void)
{
PORTB ^=BIT(7);
TCNT0 = 0x0C; //reload counter value
}

//call this routine to initialize all peripherals
void init_devices(void)
{
//stop errant interrupts until set up
CLI(); //disable all interrupts
port_init();
timer0_init();

MCUCR = 0x00;
GIMSK = 0x00;
TIMSK = 0x02;
SEI(); //re-enable interrupts
//all peripherals are now initialized
}

//
void main(void)
{
init_devices();
//insert your functional code here...
}